Finally got the chance to play with one of the production server - to upgrade the CSF Firewall.
For this, I have to SSH to the server because upgrading CSF needs root access.
Due to restrictions in "DirectAdmin you must login to the root shell" to upgrade csf using
So I SSH-ed to the server and ran the command "csf -u". But this time, I get the following error.
-bash: csf: command not found
Okay, the path to CSF is not correct, so just need to
Then gain root access,
That's it, can upgrade CSF using the command "csf -u" automatically!